Improved bone-black kiln



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EDWARD P. EASTWICK, OF BALTIMORE, M ZlilEYLAND.

Letters Patent No.` 88,700, dated April '6, 1869.

mPRovnD BONE-BLACK mmv.

The Schedule referred to in these Letters Patentand making parl; of the sarna.

To all whom 'it ma/y concern YBe it known that I, EDWARD P. EAsTWIcK, of the city of Baltimore, in the State of Maryland, have invented a new and useful Improvement in Bone-Black Y Kilns, or kilns for similar purposes.

My invention consists in the manner of supporting upper and lower vertical retorts. in bone-black kilns, or 'kilns for similar purposes, so that both upper and lower retorts are sustained on a central support, and allowing thev lower retorts to be suspended over and enter into themouth-pieces of the coolers below, which coolers are independent-ly supported.

To enable others skilled in the art to make and use my invention, I will proceed to describe the same.

In the accompanying drawing- Figure 1 represents a vert-ical sectionof one-half of 'a bone-black kiln, having an 'upper chamber, A, and lower chamber, B, the former containing a series of upper retorts, one of which is represented by R, and the latter a corresponding series of lower retorts, one of which is represented by R', with a corresponding series of coolers below, one of which is represented by K.

Figure 2 represents a section of an upper and lower lretort and cooler on an enlarged scale.

Figure 3 represents a top View of the lowerretort'.

Figure 4 represents the upper and lower retorts, immediately sustained upon the central support withiu referred The lower retort, R', is constructed at the top with a ange, F, of suitable Width and thickness, or other similar well-known device, which rests upon the support P, which, in the accompanying drawing, forms the floor of the upper chamber of the kiln, but this flange F may rest upon any other wellknown permanent, oentral, support, as desired. 1 prefer the floor of the upper chamber of the kiln however.

Upon the top of the flange F is arim, G, of suitable height, and set suiciently back from the mouth of the retort to allow of the insertion of the upper retort R, which thus rests upon the lower retort R', the flange F,of the lower retort R', thus supporting both the upper and lower retorts. Thus arranged, the interior of the connected retorts forms one continuous chamber'from the top ofthe upper retort to the bottorn of the cooler beneath.

Other well-known methods may be used for resting the upper retort upon'the lower, as desired, as by rims or other supportsplaced inside or outside the lower retort.

Thenlpper retort may also rest, by a ange, or similar device, on the central support, in which case the lower retort may be suspended by any well-known mode from the upper retort, over and into the cooler, and both upper and lower retorts be thus supported at the same time bythis ange, or similar device, upon this central support; or the upper retort may rest immediately upon the floor abovedescribed, or other central support, and the lower retort hang from this floor or cent-ral support, care being taken, however, to form the continuous chamber from the top of the kiln tothe bot-l tom of the cooler, as may be seen in g. 4.5; but I prefer the method of resting the 'upper retort upon the' pendently supported.

At the top of the upper retort R, and the under side ofthe top covering-plate M of the kiln, the space S is leftforthe expansion of the upper retort.

The covering-plate M, at the top of the kiln, may

be formed with neck O, which is inserted in the mouth 'of the upper retort R, which may be bell-shaped, or otherwise, acting as a covering.

The space S, at the top `of the kiln, and the upper and lower retorts, where they connect, should be well luted and bricked around upon the outside, as also the lower retort, where it enters the mouth-piece of the cooler K, below.

Double-chambered kilns, which utilize the large amount of heat lost in single-chambered kilns, and

secure other well-known advantages, have been liable to the objection that one long retort, or two or more vertical ones, fastened firmly and rigidly together, communicate their expansionand contortion to the upper retort, or, if one retort were used, to the upper part thereof, on account of the greater heat to which the lower part of the long retort, or the lower retort, is submitted, and to which the length contributes also as a leverage, thusV rendering double chambers in a great measure impracticable, unless an independent expansion were allowed for.

My invention is a mode of construction which admitsof this independent expansion ofthe upper retort R into the space S, and the lower retort R into the mouthpiece H of the cooler K, avoiding the disadvantages above referred' to, and being a different method and direction of expansion of the upper and lower retorts, as described in my patent, No. 60,492, dated December 18, 1866, and allows a cheaper mode of construction.

What I claim as my invention, and desire to secure by Letters Patent, is

The method of supporting upperand lower retorts in the bone-black kiln, or kiln for similar purposes, so that both upper and lower retorts. are sustained on a central support, and at the same time allowing the lower retort to be suspended over and enter into the moutl1-piece of the cooler below, which cooler is independently supported, as herein substantially set forth and described.

EDWD. P. EASTW'IOK. Witnesses;

' ANDREW Lonescnn,

Guo. S. WEST. 

